DiffusionMercurialRawDiffQuery.php
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	<?php

	final class DiffusionMercurialRawDiffQuery extends DiffusionRawDiffQuery {

	protected function newQueryFuture() {
	$drequest = $this->getRequest();
	$repository = $drequest->getRepository();

	$commit = $this->getAnchorCommit();

	// If there's no path, get the entire raw diff.
	$path = nonempty($drequest->getPath(), '.');

	$against = $this->getAgainstCommit();
	if ($against === null) {
	// If `$commit` has no parents (usually because it's the first commit
	// in the repository), we want to diff against `null`. This revset will
	// do that for us automatically.
	$against = '('.$commit.'^ or null)';
	}

	$future = $repository->getLocalCommandFuture(
	'diff -U %d --git --rev %s --rev %s -- %s',
	$this->getLinesOfContext(),
	$against,
	$commit,
	$path);

	return $future;
	}

	}